From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id C0596A00E6 for ; Fri, 22 Mar 2019 15:56:17 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 903E91B614; Fri, 22 Mar 2019 15:56:17 +0100 (CET) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id F316F1B614; Fri, 22 Mar 2019 15:56:15 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 22 Mar 2019 07:56:15 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,256,1549958400"; d="scan'208";a="127734260" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.46]) ([10.237.221.46]) by orsmga008.jf.intel.com with ESMTP; 22 Mar 2019 07:56:13 -0700 To: Wei Zhao , dev@dpdk.org Cc: stable@dpdk.org, stephen@networkplumber.org, konstantin.ananyev@intel.com References: <1552896961-33681-1-git-send-email-wei.zhao1@intel.com> <1553224548-37749-1-git-send-email-wei.zhao1@intel.com> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.6.0 MIME-Version: 1.0 In-Reply-To: <1553224548-37749-1-git-send-email-wei.zhao1@intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-stable] [PATCH v3] app/testpmd: fix support of hex string parser for flow API X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Sender: "stable" On 3/22/2019 3:15 AM, Wei Zhao wrote: > There is need for users to set configuration of HEX number for RSS > key. The key byte should be pass down as hex number not as char > string. This patch enable cmdline flow parse HEX number, > in order to not using string which pass ASIC number. > > Fixes: f4d623f96119 ("app/testpmd: fix missing RSS fields in flow action") > Cc: stable@dpdk.org > > Signed-off-by: Wei Zhao > Tested-by: Peng Yuan <...> > @@ -4475,6 +4486,138 @@ parse_string(struct context *ctx, const struct token *token, > return -1; > } > > +static uint32_t > +get_hex_val(char c) > +{ > + switch (c) { > + case '0': case '1': case '2': case '3': case '4': case '5': > + case '6': case '7': case '8': case '9': > + return c - '0'; > + case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': > + return c - 'A' + 10; > + case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': > + return c - 'a' + 10; > + default: > + return 0; > + } > +} > + > +static int > +parse_hex_string(const char *src, uint8_t *dst, uint32_t *size) > +{ > + const char *c; > + uint32_t i; > + > + /* Check input parameters */ > + if ((src == NULL) || > + (dst == NULL) || > + (size == NULL) || > + (*size == 0)) > + return -1; > + if ((*size & 1) != 0) > + return -1; > + > + for (c = src, i = 0; i < *size; c++, i++) { > + if (isxdigit(*c)) > + continue; > + else > + return -1; > + } > + > + *size = *size / 2; > + > + /* Convert chars to bytes */ > + for (i = 0; i < *size; i++) > + dst[i] = get_hex_val(src[2 * i]) * 16 + > + get_hex_val(src[2 * i + 1]); > + > + return 0; > +} I can see this has been discussed already but what would you think updating the 'parse_hex_string' something like following, it is less code to maintain: static int parse_hex_string(const char *src, uint8_t *dst, uint32_t *size) { int len; int i for (i = 0, len = 0; i < *size; i += 2) { char tmp[3]; snprintf(tmp, 3, src + i); dst[len++] = strtoul(tmp, NULL, 16); } dst[len] = 0; *size = len; return 0; } (indeed with better error checking on strtoul ;) ) <...> > + /* Output buffer is not necessarily NUL-terminated. */ > + memcpy(buf, hex_tmp, hexlen); > + memset((uint8_t *)buf + len, 0x00, size - hexlen); Can't this overflow the 'buf'? since "len = 2 * hexlen" I guess intention is "buf + hexlen"